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feat: migrated lz4 to bun
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@@ -1,50 +0,0 @@
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import { crc32 } from 'crc';
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import { encodeBlockHC } from 'lz4';
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/**
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* Thanks Maddoxkkm! Modernized heavily.
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*
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* https://github.com/Maddoxkkm/dvpl_converter/
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*/
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export function writeDVPL(buffer: Buffer) {
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let output = Buffer.alloc(buffer.length);
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const compressedBlockSize = encodeBlockHC(buffer, output);
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if (compressedBlockSize === 0 || compressedBlockSize >= buffer.length) {
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const footerBuffer = toDVPLFooter(
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buffer.length,
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buffer.length,
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crc32(buffer),
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0,
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);
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return Buffer.concat([buffer, footerBuffer], buffer.length + 20);
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} else {
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output = output.subarray(0, compressedBlockSize);
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const footerBuffer = toDVPLFooter(
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buffer.length,
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compressedBlockSize,
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crc32(output),
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2,
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);
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return Buffer.concat([output, footerBuffer], compressedBlockSize + 20);
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}
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}
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function toDVPLFooter(
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inputSize: number,
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compressedSize: number,
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crc32: number,
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type: number,
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) {
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const result = Buffer.alloc(20);
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result.writeUInt32LE(inputSize, 0);
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result.writeUInt32LE(compressedSize, 4);
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result.writeUInt32LE(crc32, 8);
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result.writeUInt32LE(type, 12);
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result.write('DVPL', 16, 4, 'utf8');
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return result;
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}
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